bogon:~ apple$ sudu cp composer.phar/usr/local/bin/composer

-bash: sudu: command not found

bogon:~ apple$ cd /usr/local/bin/

bogon:bin apple$ ls-il

-bash: ls-il: command not found

bogon:bin apple$ ls-al

-bash: ls-al: command not found

bogon:bin apple$ 

请问我这边全局安装为什么找不到/usr/local/bin/这个目录呢？我已经用命令行下载下来了composer了，但是这边全局安装处问题了。帮忙解决下，谢谢！